.transition (@index) {
  -webkit-transition: @index;
  -moz-transition: @index;
  -ms-transition: @index;
  -o-transition: @index;
  transition: @index;
}

.box-shadow (@index) {
  box-shadow: @index;
  -webkit-box-shadow: @index;
  -moz-box-shadow: @index;
}

.border-radius (@index:3px) {
  -webkit-border-radius: @index;
  -moz-border-radius: @index;
  border-radius: @index;
}